Machine for pulverizing ore.



110.8%,954. 4 PATENTED AUG. 25, 1908.

F. w. THOMSON.

MACHINE FOR PULVERIZING DRE.

7 P T N r .2 1 0 AP LIOA I0 ILED ocT 9 1 ZSHEETSJSHBET 1' H JNM.

No. 896,954. PATENTED AUG. 25, 1908.

F. THOMSON.

MACHINE FOR-PULVERIZING ORE.

AYPLIGATION FILED 00T.2,190'1.

2 SHEETSSHEET 2.

FREDERICK WILLIAM THOMSON, OF .FORT WILLIAM, ONTARIO, CANADA.

l MACHINE FOR PULVERIZ ING- ORE.

Specification oflLetters Patent.

Patented Aug. 25,1908.

- Application filed October 2, 1907. Serial No. 395,590.

To all whom it may concern:

Be it known that I, FREDERICK WILLIAM 'lno usou, a subject of the Kingof England, residing at Fort William, in the Province of Ontario andDominion of Oariada, have invented a new and useful Machine forPulverizing (he, of which the following is a specification.

This invention relates to machines for ulverizing ore and its object isto provir e a structure of this character having a novel ar raaigcmcntof grinding or crushing rolls, operating to crush the ore u )011 acircular die plate cooperating therewith A stillv further 'object is toprovide simple means whereby the pulverized material may be readilycollected and discharged, the entire device being so-formed as toproduce practically no dust within the surrounding atmosphere.

A further object is to provide novel means whereby the material to beiulverizedcan be readily fed between the re ls while the machine is inoperation.

With these and other objects in view the invention consists of certainnovel features of construction and combinations of parts which will behereinafter more fully described and pointed out in the claims.

In the accompanyingdrawings is shown the preferred form of theinvention.

In said drawingsz l i ure 1 is a transverse section through thepulverizing mechanism. Fig. 2 ,is a section taken transversely throughthe shaft of the, machine close to the ad'oining head of the machine,all but'one 0 the screens being removed from the head. Fig. v

3 is an elevation of the feed end of the machine, the hood being shownin section and the adjoining screen entirely removed.

Referring to the figures by characters of reference, 1 designates asupporting frame on which is journaled a drive shaft 2 carrying pxulley3 at one end while its other end has ub 4 keyed or otherwise fastened toit.

a P 5 from which radiate integral spokes 6 which are formed with a ring7. An annular flange 8 is formed with. the ring and said ring with itsspokes and hub 4 constitutes one of the heads of the grindingmeclumism'. Ribs 9 are disposed longitudinally u 011 the outer faces ofthe spokes 6 and ra iate from the hub 4. Sectoral recesses are thusformed between the ribs and the spaces between the spokes are designedto be closed by screens ormed upon the hub 4 is an annular flange i 10bolted or otherwise fastened within the recesses and to the spokes,flange 5 and ring 7. Only one of these screens has been shown inposition in Fig. 2 but it is of course to be understoodthat a screen isto be interposed between every two adjoining ribs. A ring 11 is-arrangedopposite ring 7 and has an annular flange 12 similar to flange 8 Both ofthese flanges 8 and 12 have openings 13 designed to receive bolts 14whereby the two rings may be clamped upon opposite edges of a die ring15. The flanges 8 and 1.2 are preferably offset from the rings 7 and 11so as to partly lap the die ring and hold it properly centered asindicated in Fig. 1. The die ring 15 may be of any preferred crosssectional contour but, as shown in the drawings, it is preferably formedwith a central interior annular rib 1.6 convex in cross section. lting1]. is not provided with spokes but, instead,

has an annular screen -17 fastened to it, there being a circular opening1.8 at the center 0] the screen and secured to the screen and aroundthis opening is a reinforcing ring 1!). Ring 11, screen 17, and ring 1.)constitute the other head of the apparatus.

Disposed within and concentric with each ring 7 and 11 is a supportingring 20. The two rings are fastened together by means of ribs 21 orother suitable fasteningdcvices and each ring has' a plurality ofinwardly extending cars 22 arranged in pairs and constitute guides forthe trunnions 23 of rolls 24. The peripheries of these rolls are shapedso as to conform with the contour of the die ring 15.

Mounted at one sideof the frame 1 is a hood comprising a lower section26 and an upper section 27, both sections being prov1 ed at theirmeeting edges with flanges 28 designed to be bolted or otherwisefastened together. The hood is of sufficient size to completel inclosethe two heads of the grinding mec anisln and has an opening 29 in onewall to receive shaft 2, while a large opening 30 is formed in theopposite Wall of the hood .for the reception of a feed 0 linder 31. Thiscylinder projects through tfis ring 19 and between the rolls 24 andabuts against the flange 5 of hub 4. An arm 32 is rigid with thecylinder and extends downward and is pivotally connected in brackets 33secured to the floor or other structure upon which the machine is.mounted.

An opening 34 is formed in the bottom porthe shaft.

the lower T0118 24 and constitutes an outlet for material supplied tothe cylinder.

In using the machine herein described the shaft 2 is set inmotion andwill cause the rapid rotation of the two rings 7 and ,11 and J whereasthe cylinder "31 willr and will act upon the ore to thoroughly pulverizeit. When the ore has been reduced to a desiredgrade of fineness it will.be thrown outward through the screens and into the hood from which itwill be discharged through an outlet spout 35 provided at the bottom ofthe hood.

-1. In an ore pulverizer .the combination with oppositely disposedscreen heads and a die ring detachably mounted and clamped between theheads, .one of said heads having a central opening; of a tubular feeddevice projecting through the opening and bearing against the oppositehead, said device having an outlet opening, driving means connected toone of the hea s, a pivoted support for the feed device and a luralityof connected crushing roils movab e around the feed device and upon thedie rin said rolls being disposed to travel longitudinally of the outletin the feed device.

2. In an ore pulverizer the combination with a screen head having acentral opening, a tubular feed device extending through the opening andhaving an outlet, and a plvoted support for said feed device; of a driveshaft, a screen head secured thereto and bearing against the inner endof the feed device, a die ring clamped between the heads and concentricwith the feed device, supporting rings loosely mounted between andadjacent the inner faces of the screen heads, and crushing rollsengaging said rings and held against lateral movement thereby, saidrolls being in-" terposed between and bearing upon the die ringand the.feed device.

3. In an ore pulverizer the combination with ascreen head having acentral opening, a tubular feed device projecting-through the openingand having an' outlet, and a pivoted support for said device of a drive,shaft; a screen head secured to one end portion thereof and bearingagainst the feed device, a die ring clamped between the screen heads andconcentric with the feed device, supporting rings loosely intel lposedbetween the screen heads, crushing ro ls interposed between and engagingthe supporting rings and held against ateral movement thereby, saidrolls bearing upon the feed device anddie ring, and a sectional headinclosing and spaced from the screen heads and die ring, said headhaving an opening through which the feed device projects.

In testimony that I claim the foregoing as my own, I have hereto aflixedmy signature in the presence .of two witnesses.

FREDERICK WILLIAM THOMSON.

Witnesses: JOHN MCCLU'BE,

Ronnn'r SWANSON.

